Miscellanies. 383 
Prof. J. remarks: ‘In comparing the results in the above analyses 
with those of other experiments on anthracite, I find the average 
amount of carbon much greater than has heretofore been assigned to 
that species of fuel. - Thus, of twelve species of anthracite analyzed 
by Berthier, the mean per-centage of carbon was 79.15; ashes, 13.25; 
volatile matter, 7.37.” 
No, 5. Sp. grav. 1.6127. Combustible carbonic oxide, and a little 
carburetted hydrogen expelled at red heat, 3.55; carbon not vola- 
lilizable by simple heat, 86.06; earthy matter, 3.71100. 
No. 6. Sp. grav. 1.559. Water, .390; gaseous matter, including 
some azote, volatile at bright red heat, 5.515; carbon, not volatiliza- 
ble by heat, 91.016; earthy matter and oxides, 3.079= 
Tron Ores.—The bed of iron ore from which were taken the sam- 
ples examined by Prof. Johnson, is found on the southern declivity 
of the bluff, about forty rods northerly from the south fork of Beaver 
Creek. The thickness of the bed of ore and shale is seven feet, and 
it lies seventeen feet beneath the surface of the ground at the point 
where it is opened. The first variety analyzed jae by the usual 
assay in the dry way, the following results: 
Water, expelled at 250°, . ‘“ ; ee 0.4 
Carbonic acid, ©. # > * ~ 26.6 
Cast iron, . : é 3 z 33.8 
Earthy matter, . : ; i‘ z é 26.64 
Oxygen, . : . é ° ‘ ‘ 12.55 
‘The ore bas a light bluish ash color, is moderately tough before cal- 
cination, and has a spec. grav. of 3.247. The pig metal given in the 
assay is soft, tough, and of a dark gray color. The cinder isa trans- 
parent, nearly colorless, glass, very fusible, and contains few adher- 
ing particles of metal. The use of pure carbonate of lime as a flux 
in the proportion of one part of this metal to six parts of raw mine, 
will produce a complete reduction of the ore and fusion of the earthy 
ingredients. Agaayes! in the humid way, this ore yields the following 
results : 
> . . ; « 
Carbonate of iron, ‘ F ; ‘ a 63.20 
iy of lime, P ‘ ee oe 2.50 
ee of magnesia, . re eae . 2.27 
Oxide of manganese © eee tw 2.00 
‘ Silica, ; * ‘ i z ‘ 17.50 
s Alumina, . S . a . 2 ‘ 10.55 
